What does a green signal indicate?

A green signal is universally understood in rail operations to indicate that the train can proceed safely and often at full speed. This signal assures the engineer that the track ahead is clear of hazards, allowing for uninterrupted travel. The green indication is a crucial part of signaling protocols, designed to enhance safety and efficiency in train operations.

In contrast, a stop signal would indicate that a train must halt, while a prepare-to-stop signal serves as a cautionary note that the engineer should be ready to halt at the near future signal. A malfunctioning signal might lead to confusion or uncertainty about what action is required, but a green light distinctly conveys permission to move forward without hesitation. Understanding these signals and their meanings is vital for operating safely and effectively on the railways.